MD5Engine.h

//// MD5Engine.h//// $Id: //poco/1.3/Foundation/include/Poco/MD5Engine.h#2 $//// Library: Foundation// Package: Crypt// Module: MD5Engine//// Definition of class MD5Engine.//// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.// and Contributors.//// Permission is hereby granted, free of charge, to any person or organization// obtaining a copy of the software and accompanying documentation covered by// this license (the "Software") to use, reproduce, display, distribute,// execute, and transmit the Software, and to prepare derivative works of the// Software, and to permit third-parties to whom the Software is furnished to// do so, all subject to the following:// // The copyright notices in the Software and this entire statement, including// the above license grant, this restriction and the following disclaimer,// must be included in all copies of the Software, in whole or in part, and// all derivative works of the Software, unless such copies or derivative// works are solely in the form of machine-executable object code generated by// a source language processor.// // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER// DEALINGS IN THE SOFTWARE.////// MD5 (RFC 1321) algorithm:// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All// rights reserved.// // License to copy and use this software is granted provided that it// is identified as the "RSA Data Security, Inc. MD5 Message-Digest// Algorithm" in all material mentioning or referencing this software// or this function.//// License is also granted to make and use derivative works provided// that such works are identified as "derived from the RSA Data// Security, Inc. MD5 Message-Digest Algorithm" in all material// mentioning or referencing the derived work.//// RSA Data Security, Inc. makes no representations concerning either// the merchantability of this software or the suitability of this// software for any particular purpose. It is provided "as is"// without express or implied warranty of any kind.//// These notices must be retained in any copies of any part of this// documentation and/or software.//#ifndef Foundation_MD5Engine_INCLUDED#define Foundation_MD5Engine_INCLUDED#include "Poco/Foundation.h"#include "Poco/DigestEngine.h"namespace Poco {
00073class Foundation_API MD5Engine: publicDigestEngine /// This class implementes the MD5 message digest algorithm, /// described in RFC 1321.{
public:
enum
{
BLOCK_SIZE = 64,
DIGEST_SIZE = 16
};
MD5Engine();
~MD5Engine();
unsigned digestLength() const;
void reset();
const DigestEngine::Digest& digest();
protected:
void updateImpl(constvoid* data, unsigned length);
private:
staticvoid transform(UInt32 state[4], constunsignedchar block[64]);
staticvoid encode(unsignedchar* output, const UInt32* input, unsignedint len);
staticvoid decode(UInt32* output, constunsignedchar* input, unsignedint len);
struct Context
{
UInt32 state[4]; // state (ABCD)
UInt32 count[2]; // number of bits, modulo 2^64 (lsb first)unsignedchar buffer[64]; // input buffer
};
Context _context;
DigestEngine::Digest _digest;
MD5Engine(constMD5Engine&);
MD5Engine& operator = (constMD5Engine&);
};
} // namespace Poco#endif // Foundation_MD5Engine_INCLUDED